When the high current flows through the circuit the fuse wire will melt and the circuit is broken and the appliances will be saved from damage. A fuse is needed in any AC or DC electronic circuit. … This helps to maintain the appliances and the earth at same potential so that it prevents electric shock.
Why do we use household circuits?
Electric fuses are connected in household circuits to prevent damages due to overloading. It is a thin wire with a low melting point when current flow exceeds the limit the fuse wire gets heated up and melts. Thus circuit breaks and current flow stops. Thus appliances are saved from being damaged.
What is household circuit?
Household circuit is an electrical system that basically controls the flows of electricity at our house . In our house, the more things that are turned on, the more current is requested .
What is the importance of fuse in a household electric circuit?
A fuse(s) is needed in any electrical system (AC or DC). These protection devices react to the amount of heat being produced by electricity passing through wires and/or components. They are used so as to protect wires and components from the extreme heat produced should there be an electrical overload or short circuit.
What are the relative advantages of household electric circuits?
(i) To have equal potential difference across each appliance. (ii) Each appliance has separate switch to the flow of current through it, so that each circuit can work independently.
Why does Nichrome wire heat up?
Nichrome due to its high resistivity does not allow the electric energy easily to pass through it. This electrical energy is changed into heat energy. So nichrome wire gets heated in an electric circuit.
How can we prevent overloading?
How to Prevent Circuit Overload
- Calculate your circuit load. Most circuits are rated for between 15 and 20 amps, so if you get a figure for how much current your lights and appliances draw you can ballpark how much is safe to plug in. …
- Be careful with large appliances. …
- Invest in LEDs. …
- Install more circuits.
How are the circuit wire in a house?
Circuits in houses are generally wired in parallel, which allows you to operate each light or power point independently of the others.
Is a house AC or DC?
When you plug things into the outlet in your house, you don’t get DC. Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time).
What are the 3 types of circuits?
There are actually 5 main types of electrical circuits: Close circuit, open circuit, short circuit, series circuit, and parallel circuit. Each type of circuit is designed to create a conductive path of current or electricity.
Why is an electric fuse required in all electrical appliances Class 7?
Electric fuse is required in all electrical appliances to prevent damage from excessive current flow and during short circuit.
What is an electric fuse what is its importance class 7?
A fuse is a safety device which limits current in circuit as a result it prevents damages to electrical circuits and possible fires. Fuses used in electrical appliances.
What are electric fuses why are they important class 7?
Answer: A fuse is a safety device in an electric circuit. It is made by inserting a short wire into an insulating material. Fuses are used so that if a fault occurs and too much current flows, the fuse wire melts before anything else is damaged.